St. Louis is waking up clear and cool this morning, with temperatures hanging around 43°F at first light. It will be a sunny but breezy Sunday, with a high near 59°F and northwest winds of 9 to 13 mph, gusting up to 21 mph. Tonight stays mostly clear with a low near 42°F.
Afternoon Winds Pick Up
Those northwesterly winds will crank up through the afternoon, so it may feel a bit brisk even under blue skies. Gusty conditions could knock around lightweight yard items and turn riverfront walks into a bit of a wind tunnel. Cyclists should be ready for sudden gusts during the afternoon commute, and drivers of high-profile vehicles may notice cross-wind effects on bridges and open stretches of road.
Freeze Risk Monday Night Into Tuesday Morning
Looking ahead, there is a roughly 40 to 70% chance of temperatures dipping below freezing across parts of northeastern Missouri and west-central Illinois on Tuesday morning (April 7, 2026), which puts tender vegetation at risk. The National Weather Service notes that a band of light precipitation could develop Monday night into Tuesday morning (April 6 to 7, 2026), and where temperatures fall below freezing a changeover to light snow is possible, though confidence in any accumulation remains low; see NWS St. Louis for details. Gardeners and anyone with potted or newly planted vegetation should plan to cover or move plants indoors before Monday night.
Quick Warm-Up Later This Week
Temperatures rebound by midweek, with highs reaching the 70s by Wednesday and into the upper 70s by Friday as a warmer, more humid pattern settles in. Showers and a few thunderstorms become more likely late in the week and into the weekend, following the stormy stretch earlier in the week covered in the recent severe storms recap. If you have outdoor plans later in the week, it will be worth keeping an eye on the evolving forecast.
Bottom line: enjoy the sunshine today, but grab a jacket for the wind and make a plan to protect tender plants before Monday night. Check the National Weather Service for updates if your plans stretch into next week.
